506 



New Species of Prionocalus from Ecuador and Peru. 



and convex elytra miglit be mistaken for a female. It differs 

 from all in having the posterior angles of the thorax com- 

 pletely rounded off. It is most nearly allied to P. tj/his, 

 White, but has more ample elytra. The palpi have the apical 

 joint unusually enlarged. The head has the tubercle at the 

 side short and conical, not very acute. The thorax is rugose, 



Prionocalus uniformis. 



Priotwcalus Giintheri. 



but has two smooth spots on the front margin and another 

 above each posterior angle. The sides are impressed and the 

 margin is furnished witii two rather small approximate trian- 

 gular teeth just before the middle, and in front of these 

 there is a slight angular prominence ; behind the lateral 

 teeth the thorax is obliquely narrowed, and there is no trace 

 of any tooth at the hind angles. The elytra are nearly as 

 wide as the thorax, convex, evenly and very coarsely rugose 

 all over (each with two slightly indicated raised lines), not 

 much narrowed towards the apex. The humeral angle is 

 furnished with a very small acute tooth. The sides are 

 evenly and gently arcuate. The apices are rounded, but 

 there is a slight indication of the sutural angle. 



The smaller example has the teeth at the sides of the 

 thorax rather more prominent and acute than in the large 

 specimen. 



